Fan attachment for sewing-machines



No. 627,124. Patented June 20, i899. E. KEMNITZ.

FAN ATTACHMENT FOR SEWING MACHINES.

(Application filed Nov. 3, 1898.!

(No Model.)

A Home QTNESSE W I INVENTO]? UNITED STATES PATENT OFFICE.

EMIL KEMNITZ, OF MEMPHIS, TENNESSEE.

FAN ATTACHMENT FOR SEWING-MACHINES.

SPECIFICATION forming part Of Letters Patent No. 627,124, dated June20,1899. Application filed November 3, 1898. Serial No. 695,386. (Nomodel.)

To all whom it may concern;

Be it known that I, EMIL KEMNITZ, a resident of Memphis, in the countyof Shelby and State of Tennessee, have invented certain new and usefulImprovements in Fan Attachments for Sewing-Machines; and I do herebydeclare the following to be a full, clear, and ex act description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

My invention relates to an improvement in fan attachments forsewing-machines, the object of the invention being to provide a deviceof the above character which can be easily connected to a sewing-machineand as easily removed therefrom.

A further object is to provide a fan attachment for a sewing-machinewhich will be so constructed that when it is connected with asewing-machine the operating mechanism for said fan can be readilydisconnected from or connected with the operating mechanism of thesewing-machine.

With these objects in view my invention consists in a shaft adapted tobe removably mounted on a sewing-machine, a fan secured at one end ofsaid shaft, and a pulley secured at the other end of said shaft, adrive-pulley adapted to be sprung over the milled head of the clutchdevice of the sewing-machine, and an endless cord or strap passingaround said pulleys.

The invention further consists in certain novel features of constructionand combinations and arrangements of parts, as will be more fullyhereinafter described, and pointed out in the claims. a

In the accompanying drawings, Figure 1 is a view in perspectiveillustrating my improvements, and Figs. 2, 3, and 4 are detail views ofmy improved operating-pulley.

1 represents a sewing-machine of any approved construction, having theusual handwheel 2 and bobbin-windiug clutch mechanism operated by themilled head 3, as usual.

My improved fan attachment comprises a vertical standard or support 4,provided at its lower end With extended bearing-plates 5 and adownwardly-extending screw 6, adapted to pass through the table of themachine, and a thumb-nut 7 is adapted to be screwed on said screw 6beneath the table of the sewing-machine, and hence rigidly and1GI]1OV,'- ably secure the standard or support 4 in place. The upper endof the standard or support 4 is bent at right angles to form ahorizontal arm 8, and any suitable brace 9 may be seen red to thestandard or support 4 and arm 8, and said brace 9 may be in the form ofan ornamentation. The horizontal arm 8 is provided withupwardly-extending parallel ears 10, preferably integral with the saidhorizontal arm, and each ear is provided with a hole or opening for thereception of a shaft 11. The shaft 11 may be provided with any suitablestops or enlargements to prevent its removal from the ears and isprovided at one end with any suitable fan 12, which is secured theretoand adapted to turn therewith. A pulley 13 is secured to the other endof said shaft 11, and an endless cord, strap, or chain 14 is passedaround said pulley and adapted to turn same, and the said cord, strap,or chain 14 also passes around and is operated by my improved pulley 15,which will now be described. The pulley 15 is composed of spring metalor othersuitable material and comprises a cylindrical body portion 16,preferably of a diameter slightly larger than the diameter of the milledhead 3, hereinbefore referred to. Parallel flanges 17 are formed on theperiphcry of the body portion 16 for the reception of the endless cord,strap, or chain 14,, and the body portion 16, between the parallelflanges 17, is roughened or the surface made irregular, whereby to morefirmly engage the cord, strap, or chain and prevent slipping. The innerface of the cylindrical body 16 is provided with oppositelydisposed lugsor teeth 18, whereby to engage the milled head 3 between itscorrugations and secure the pulley 15 thereto. WVhen it is desired toapply the pulley on the milled head, it is simply necessary to grasp thepulley at opposite points between the lugs or teeth 18 and compresssame, which will force the teeth orlugs 18 away from each other. Thepulley can then be easily placed over the milled head 3, and when inthis position the operator simply withdraws the pressure on the pulleyand the lugs or teeth 18 will spring between corrugations or projectionson the milled head 3 and insure the turning of the pulley with themilled head when the latter revolves. If desired, a screw 19 may bescrewed through the cylindrical body 16 of the pulley to guard againstany possibility of lateral displacement of the pulley 15 from the head3.

The operation of my improved fan attachment is as follows: Motion istransmitted Various slight changes might be resorted to in the generalform and arrangement of the several parts described Without departingfrom the spirit and scope of my invention, and hence I would have itunderstood that I do not wish to limit myself to the precise details setforth, but consider myself at liberty to make such slight changes andalterations as fairly fall Within the spirit and scope of my invention.

Having fully described my invention, What I claim as new, and desire tosecure by Letters Patent, is-

1. A fan attachment consisting of a bracket, a fan revolu bl y mountedon said bracket and carrying a pulley, a collapsible pulley adapted tobe carried by a head or extension on the hub of the fly-wheel of amachine, said collapsible pulley having an internal diameter appreciablygreater than the diameter of said head or extension, teeth within saidcollapsible pulley at diametrically opposite points and adapted toengage said head or extension, the collapsible pulley being adapted tobe applied to the head or extension by squeezing said pulley at pointsat right angles to said teeth and a strap connecting said pulleys.

2. The combination in a fan attachment, of a shaft carrying a fan and apulley, a collapsible pulley adapted to be carried by a milled head on arevoluble part of a machine, said collapsible pulley having an internaldiame-' ter appreciably greater than the diameter of the milled head towhich it is to be applied, and having internal teeth at diametricallyopposite points, adapted to engage said milled head,set-screws passingthrough said collapsible pulley at points at right angles to said teeththe collapsible pulley being adapted to be applied to the milled head bysqueezing said pulley at points at right angles to said teeth and astrap connecting said pulleys.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

EMIL KEMNITZ.

Witnesses:

O. P. BLAKE, JAs. J. COLLINS.

